The marks in a physics class have a mean of 79 and a standard deviation of 12. The marks in a chemistry class have a mean of 70 and a standard deviation of 18. Andrew had a mark of 90% in both classes. Why might you consider one of these marks to be better than the other? Use calculations in your explanation.

Q: suppose that you hav e set of data that has a mean of 34 and a standard deviation of 6. a. is the…

A: Given: A data set has a mean of 34 and a standard deviation of 6.

Q: etic test has a mean of 60 and a standard deviation of 20. The vocabulary test has a mean of 60 an a…

A: A z-score is known as the standard score that determines how much the data point deviates from the…

Q: The first statistics exam had a mean of 73 and a standard deviation of 15 ​points; the second had a…

A: The objective of the question is to compare the performance of Anna and Megan on two different exams…

Q: Use the data 2, 3, 3, 6, 6, 7. Add 2 to each of the numbers. How does this affect the mean? How does…

A:

Q: Q2. Find the standard deviation for the data: 5,10,7,12,0,20 7

A: We have to find the standard deviation for the data: 5,10,7,12,0,20

Q: Question: Both Aaron and Marie, who attended different schools, finished grade 12 with final…

A:

Q: company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: Decide if the following statement is true or false. Explain why. It is possible to have a standard…

A: We need to decide if the given statement that " It is possible to have a standard deviation of -2…

Q: For an Economics test the mean score is 100 and the standard deviation is 10, and for an Accounting…

A: The mean and standard deviation of Economics are 100 and 10.

Q: SAT scores have a mean of 1000 and a standard deviation of 100. ACT scores have a mean of 20 and a…

A: Solution:Given data: SAT score, μ =1000mean score                                            x…

Q: Ngan scored 1 standard deviation below the class average on a statistics exam. The class average was…

A:

Q: mar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the test…

A: given data, μ=54.5σ=3.1Omar scores exactly 0.75 standard deviations above the mean z=0.75raw score…

Q: For a statistics test the mean is 63 and the standard deviation is 7.0, and for a biology test the…

A: We know that ,Z-score=x-μσ

Q: Every observation in a data set is multiplied by a constant k. What best describes the effect on…

A: Given : Every observation in a data set is multiplied by a constant k. Let assume observations are :…

Q: In an  administration to 2000 student the average score is 65 and the standard deviation is 25.…

A: Given in an administration to 2000 student the average score is 65 and the standard deviation is 25.…

Q: 3.) If you choose 25 companies, what is the probability that they a 0.5 percent? A.) 0.0162…

A:

Q: Omar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 105   and a standard…

A: It is given that the mean and standard deviation are 105 and 15, respectively.

Q: SAT scores have a mean of 1026 and a standard deviation of 209. ACT scores have a mean of 20.8 and a…

A:

Q: Assume the test scores in your class are normally distributed with a mean of 84. You scored a 96,…

A: Given: mean = 84.

Q: Betty’s medical score is 100 and her Z Score is 1.5. Bob’s medical score is 60 and his Z Score is…

A: Betty’s medical score is 100 and her Z Score is 1.5. Bob’s medical score is 60 and his Z Score is…

Q: A distribution of data has a mean of 26 and a standard deviation of 2. How many standard deviations…

A: Population mean μ =26 Population standard deviation =2

Q: Calculate the correct mean and standard deviation.

A: Here use standard deviation and mean formula

Q: A college admissions office needs to compare scores of students who take the SAT vs ACT. The…

A: Given,For SATMean, μ1 = 896Standard deviation, σ1 = 174For ACTMean, μ2 = 20.6Standard deviation, σ2…

Q: unts how many meteors she se

A:

Q: The first statistics exam had a mean of 73 and a standard deviation of 15 ​points; the second had a…

A: From the provided information,Anna scored a 82 on both tests. Megan scored 92 on the first exam and…

Q: Use the data 2, 3, 3, 6, 6, 7. Add 3 to each of the numbers. How does this affect the mean? How does…

A: Answer;- Given data  2, 3, 3, 6, 6, 7               Add 3 to each of the numbers.               How…

Q: Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The…

A: The standard deviation of students lab measurements is 8. Juan repeats the measurement 2 times. That…

Q: Suppose you have already calculated the mean, the average deviation, and the standard deviation of…

A: (a) Condition for Average Deviation: If the value of the observation is increased or decreased by a…

Q: For an Economics test the mean score is 100 and the standard deviation is 10, and for an Accounting…

A:

Q: In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviation…

A: Given: Sample size n = 10 Sample mean X = 78.9 Sample standard deviation s = 5.2 Formula Used: X =…

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Let X: the length of trout caught in Pyramid LakeGiven that,Mean length(μ) = 19 inches.Sample…